/*
 * Copyright 2023 devaper
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.github.devaper.pigeon.handler.argument

class ArgumentHandlerUtils {

    companion object {

        private val cache = HashMap<Class<out ArgumentHandler>, ArgumentHandler>()

        /**
         * 获取参数处理器实例, 自动创建实例并缓存
         *
         * @param clazz 参数处理器类型
         */
        @Synchronized fun getArgumentHandler(clazz: Class<out ArgumentHandler>): ArgumentHandler {
            return cache.getOrPut(clazz) {
                val constructor = clazz.constructors.find { it.parameterCount == 0 }
                    ?: throw NoSuchMethodException("${clazz.canonicalName}()")
                return constructor.newInstance() as ArgumentHandler
            }
        }

    }

}